Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b28d03775d40b89dd4c3d53deda4300c61990ee6667b821340dfac2213a438b8' 
  AND token = '3iX5EGAO6qSAkTrF4eeq/g+dLGaoNXXd6m0mAoCLfqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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