Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a48eb656c1ce540b1cd103917a17c9e79c4613e30217da8d2822acf9ffd67e8' 
  AND token = 'zmG+ppjRoybFIRD0CS3Q7SOE+GV029IuQ718824W/P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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