Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b0a66b4dec1502dd28fba83426977c2d4fc79808b452bba31f2345d24723abf' 
  AND token = 'XOOXLG+6qZoiVPOsqso1LjrC2wECkhE5hkL5hCo8hvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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