Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf662bc9d6b4da03a2cbcf3b15cc590dfcbdea3e912bc892e1880a0cd9c19b7e' 
  AND token = '97ArV+KRD76IADuc2vhpIXXrwjCyReYpb/Vj+VzGWDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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