Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe5a8fab8afdacd9e767e30c2e4838e6981f34a7f855c955ea53b9b3da0b3f19' 
  AND token = 'BJ4PNdRor4RYUhW8jIjtCSpGLg4OTrnKA8WIMMAxtas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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