Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8996753641df543dae05e86b75fc877c0ce1a27f0bd598921134ba162aa1430b' 
  AND token = 'V3oDgmFeoVktAWFk/6/pWBRUZXevtGTlZ17tk6bs1SI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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