Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36a4573b27386803bd58b5ee16fc2d28ae4b850a2e27a07e94fa5889c46f7cdb' 
  AND token = 'BNXhD5IzEW9AwOKwbiX7Qh+QKzBceObtaehwdr80QoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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