SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '308b973b417db270e1e9417f8ec7b0816d2611b34a7de72f5a5df5776780758a' 
  AND token = 'kzCGT/P2qUbXIyQMiG6N4FBHw/EuH7xOVeA2zCoj4Pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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