Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a02155400f70d64c256c5acc5276fd7fb23d37da064662c63d8fcfa92a8e5d9' 
  AND token = 'q9P8Ls2eaKvtyyNwKiR/Rx8vu8ILtofRUUi78tFlHHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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