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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d0d144bd6e0f788a49bd3b8e1c99fddd8ab78baee67d15d0badc6ef515f5515' 
  AND token = 'c6+WHpPrL9oK363Qk8hjDVizXdQaZW4AyPO8bz5AP44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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