Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2f67bd37ea812e9f5fac6583ac20b453fb832e22fbb277e80897d56e17a392c' 
  AND token = '2G9mgiN/QKDdtjHxukjMyQl0KYd20ARureVWgdQn9tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}