Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8371408391295864ca42a47da392ee525295d113ec2c365d95728b0bdba8fb3d' 
  AND token = 'Leo2wp211xsrVRPYzP9UtmAp2RpjcVb6GRgCgVc2Ogo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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