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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5603cd89a143dd69e84eb87fce90c62035d78da876c98af83a0bcf06027503e' 
  AND token = '6kaEnYS8Iu3Ush616antStjO0ZC9no3p46n1ZlkKLZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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