Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13cdd7743c855f3d79d336a47c8482171fbce57dd0d220f9e6c69b3b6911792e' 
  AND token = '12ZrCAKgk3lLwObERazjH3L0X/cJCAxL2YVEpo547sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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