Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94c48254e8ab2050435d76037931e5e32b736b8a9b5d41487e3bf336aa422b74' 
  AND token = 'FmalgddVt7gd2Gw1PLgG33Ex4xMGbQFfRSQB81zkeQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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