Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6047f2cb03be45c59d20fdb17101b49c76a6a04532043d4a6c92084916158b9' 
  AND token = 'ao7/4HJ1ySlOmgS0rRdjHLbceU+IHAYWxspPf3NjSHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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