Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa5747acb800f082f2bf27123d2ff4252535714f2f02d61b10c3a01f6447d45d' 
  AND token = 'KOWK4HIhWgwfaCq4k+pXvyPJ4T13yeKS3LkjMJ7JTzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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