Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9301b2c41533b608c69ce722a54c2c2222745dad80111c035ec69eeeb6f6ff3' 
  AND token = 'JLsz/mPsaIQnPo6kAlltbctz4VaGbqy7unBIYYDsxjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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