Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd5aab7f9d13fcaac40a444eef37d1dfbfb571e43cbd8e4d687d550843d86004' 
  AND token = 'rz84f2HBeNKwejHPrjExvvONQ3X1WDM2sPONRGzTD2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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