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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ed2ae504e29ad6250ee245a4da2de73e2f803eaf5e555fce9d61bd43d36f5b4' 
  AND token = 'ITcTr9zADD0Wk3l/lBfIejzHinNLiu8vVOwQxAvRrZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}