Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca9d563be14676de7777d90f5720d2adf5e10c32b54545d3614348933b43177c' 
  AND token = '35FyjK13qvMo/0wmEVNWTaXYqKcsw1rA2tlCLdf+xcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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