Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e5b7d76340b3ea347c46c690dd20349f828c0f5f1f110b596312f9cde705b66' 
  AND token = 'x5o+7U4nFsMl30obvR0LzKshpEZa3c8yzZfyEMUFbLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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