Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5419d0b40774e42f3df6329dd41a54450be399ae4f7df1edab4634dbb7807ed' 
  AND token = 'm+l8IV7y5fqNMDEA2VzirxQvRXJKdbi/k0HT48Gt/nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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