Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee5939cfb418eab3b340f0c7a066ff89cb993fc2eb1617a6128360afbca7f0bd' 
  AND token = 'gUY3ZezducGr0cwTxzsKj3TNFxauf5gTqjB1uQg5bBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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