Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b105ddb52b82e85be22ea5c69808205ce256f1038044cfb823b0e79c10e65f0a' 
  AND token = 'FXDYXNcq69pwsHU654cJOgwb25CI70bmnYS4IAcEwQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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