Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efaa7bb41e8025e7f9c9528ef08d103c593efb64b795e9927f526523ea1b419c' 
  AND token = 'Z1YxZ9jX0oosEj37z0nsmmhxodlwCnu6k5i9cE4/Nu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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