Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '365451be1c3de2129674e758b8ad1ec4821a56847b72d99b3ca821c2f8923e2a' 
  AND token = '0lZHs8ev6WUhAxlNPX1RqVY1zrgcBPwfiPBghM4c9dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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