Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '277359e01747074cae1c6530a63dd9e4b03e814ee2c823a014ed079d5ebccea5' 
  AND token = 'RExiMaHEA2+PVdj6oFRHcdDt1MycYSEX9ohJ99/tOKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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