Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '449b7853e2648609f5d9017cb37a32d8fc8e54fcef0682c16599942cec025b31' 
  AND token = 'bmL62aihQbodRzoX9/NPsahM+VKdhexTE6xude6ZHnc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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