Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eef12c9fe0fe84a2d3be9951ac9dafd571adc9fe6ddd299b3d383f937fe111c' 
  AND token = '753XXrkbnIv8eMBTKElsU6KqFwMWoS84LTmW/wHJosQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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