Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85a2f062bce8661b06a0deb47db036a01d64dfb23a8e3b49f76702361d42b666' 
  AND token = 'UFI2sxOOnTAgLmZIUXJlAkP8UhVXhIdgrjmXWnqhDWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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