Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '562e5a29d10044d04ecbf8582f921ae33cbab0af457bc66ccc5d72f67d5b5ac1' 
  AND token = '3ll3qBJCVZNKDwlUmeYMkOYNUCSMOB2ta99rTk1gIK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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