Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77240dcde32ace0d443e7bb3023970d4112f230588b7bd2d3399411eba1bc980' 
  AND token = '8AkczTZHci9aeknmqDpJXvdZVWYhrR6L+3y0Tv9l4WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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