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SELECT 
  cscart_ab__vendor_stickers.* 
FROM 
  cscart_ab__vendor_stickers 
  LEFT JOIN cscart_ab__stickers AS stickers ON stickers.sticker_id = cscart_ab__vendor_stickers.sticker_id 
WHERE 
  stickers.sticker_id IN (45) 
  AND stickers.vendor_edit = 'Y'

Query time 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}