Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '336697936f2e9beb8baa477603a9267045623dae6e873f2d22c6b633006fe9c7' 
  AND token = 'zinxUS+m4pEPBiRu/YF/aNjkFWIH7ChoDEiHG40Z1fg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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