Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69c7c1b73e1352e197799edbaa1af6f86852e994688c65c0cb1dbc0dc81506ff' 
  AND token = '6Y7nYUen6idRJu9gEN2N4iDmP777qn0VOeE2NkizhA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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