Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '609651089eebe83e97f61859b7bf0eac79b1359a69aaffae48af076f9166e731' 
  AND token = '6oOpmUYvw2Tgw7RDBqBRqzrq7RFVBN3YZ7NpPrBWxN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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