Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2309986c216cdd51c7e12d9b6482b7d1504537b8e2d2b02ab66ad9214596607' 
  AND token = 'x4YVRO/JdcMaYojRkytub2dcfOTjNQ46KdBiZIjEWxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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