Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f1da334ce46ef32b577c112c7dc10dcc0313d0b769800b653cd07ac746951b' 
  AND token = 'gNLdWleeCI22Ie4W0uaBNykK06EhpCuG79ROavd5ORA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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