Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b55506ebc71d95105dd32f5767c20324f9b250948a9ed982b908ad29f9e908d0' 
  AND token = 'VPBM1QUZkTrSN6jatnRmBUSyJrrVjBn2NT0+WF1o5vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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