Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '365a302557fbc62c8a873e6f1752f3d7b4b2bee0562c65b40d6d85a9b60ea5d6' 
  AND token = 'GuF3xdSxFt39dObAJ+yjY3gcY5y6lUPBFflOr2645Vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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