Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7354a8b1ec7cb8e28d19c7d9ac983155290d86fa3bc0fef00057021e81e34ad' 
  AND token = 'g9hpkw9enCskikJY4SxLW9kKiaFMOy8IwzubPWJBZnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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