Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17dd3214e5c9811a17890084cb1a13ad02a0a977298f9aed57f4c7138d4322ba' 
  AND token = 'LIndyiU46DN46JtLiE9cHSc7QXEkMhG9fBw95DK5OQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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