Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cde26842195e1e0ece910cff5957f1f59fceb7c3c75d0d334a812425bb71c3a' 
  AND token = '9uWJ66RToRnv9g2BlWtuEDZM3ZweMgRkjEA7YqK1Eq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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