Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e817562bdfc415ee2a57946565bc5edd94e7c4617509f316db9319fbeba335f' 
  AND token = 'V0zKzRbVi531zrR2wBf+WkclPtD5yvWwZoKLZF6K1GM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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