Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceed6f583b7fc5a127a2836109d8024a00c0d6350989639016c8ce80086dad19' 
  AND token = 'uosnB4ZLA37uTFz7qDOa5LClF65Y/Orl44oPyvKy4SU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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