Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cb74ffd8dc3eeb603b1e2d7c0c54819ec6d0f9df31fa435f1068f6057be28a7' 
  AND token = '9q97DvFPJL+BQx6nQXmlEwQF03X+E2rgaT8FPt1RyV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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