Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef2f653ff65a316163430803310b443e7d2772dd0fd86339371bb3bccc28c269' 
  AND token = 'FkQJkmxlRSe6P4urS3oJrtro7u6Oo1Ix6mEheZg20B8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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