Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '719537ddea03a856ebd33f2eeb2b3936b10757572d880e1234ddb37fee2e13ee' 
  AND token = 'mJlyGx6anplykLNKhvDIyFAs4aAH1oJBMQNNu/dUs20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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