Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94bfc98a706f675098cc0166bf0bdf288e511f1128607c18e787b581307029c6' 
  AND token = '8c4epvzVcFgzq8MYLqiJyQ4BJhX5x81aQmUkP4YWW2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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