Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a34311779039835af19f96d246de8bcc5b5efbda822743e0cf5b9649924f174' 
  AND token = 'OQ5Hd494PSILvmmM/YnDrxcK1ktZtA9TONae0Bzb6W4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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