Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caa1669a4d91def07e6131adb0fd7bd400ab5bb4b38e9036c88ff2f0f3844565' 
  AND token = '3WX5aZi1B7v6ICfrBz3mBJZ8MtWYqMEeaWaFNctWpeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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