Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ed5ee58eb1df14b13a7591922ded9f48b64c16a787e2794432db2843b6359da' 
  AND token = 'MMIhRf8DMQVSGY0oCUxjMwiG4chKN5fl8lDMI2q+Py8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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