Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8148491a6c73e369649dd853d8813511b08893eb9a1d827a547484585d384a5e' 
  AND token = 'I8qMkfsneGIwfti9tp08qDUNlUPGtxam4+R18clgb5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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