Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61ae4592201c331199bc8308c46dab801242916b8d6a99142a3320fdf5e61297' 
  AND token = 'kg7KX2lZGEKp//8kopTUDSd9o1QHgfYwgz2m00N1dmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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