Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f5f959b10d2235af11cdd5c390912de1958d3956c7e0d3b8b5f8908ea90cea8' 
  AND token = 'XwPi15fjulRxQFduIOIW/QJJjXMuvBXUutkKqQtFxsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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