Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e53b27a43a7598cbcb7985a9ddbad6c5129c30b463d983ef722be656490d4c9f' 
  AND token = 'Et6SJCqHPB6MDCESFQH7/Qaaoab89aCHvk6IONk90qA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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