Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6eeafac43b72544b2852f1572aafeb3a4e41a3bc48932571928aa00149aaefb' 
  AND token = '8wl44vK2CXnycZ6KwtkxfsyfWSPMy3HOoBsdo7d4Pn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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