Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9604079300af833b01c631c4bdb04940b720aa8ae7cc26f854b3a867a88a46f6' 
  AND token = 'RouRx2KDiNCZ6e/zLaPWz3C/LAR6qA7f3ajPiYN5zZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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