SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b11f75179c4cd64e83ab6d166734987d4ca7e428244403bbc73c8f0333421fe0' 
  AND token = 'Y59Big9anR7Gm4Zb/X3DgBjweoFwKdGNEgUGBGhC9Jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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