Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d8417d10c0efd2abe0e6bfda39742892eacb88a54f6c38571e52496e92fffda' 
  AND token = '8S9jDn62NaHzt6Fhsj1/d2Bx4Ig2IsoPfOomT7cPvks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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