Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f00ca193844082b9336e4b79fb2b17ab81a96aa7e9da08df6fb23dff14bff556' 
  AND token = 'Ysxkw1t3cahDUYAheJE2337b3/D9ookDLkGpv3C3c4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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