Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cea67a43038986b13a54cbdf6cba0f29d8893ce0923b90598d8f62355872d42' 
  AND token = 'QNrAy9iXOXxEFXjwFHAiSL3/dgXfSc12HgyC9abu/Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}