Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f315311602c033a1af83e8cd429d2dcd9c8449b2d11704207516bc1d556ff6d3' 
  AND token = 'f9+2m9mMqvc1wqpB5bXWaqiwnfYngNlGXs95qECv2zA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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