Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8954db7b64c49bb00d3588aedad97e465d172b1b5807f997cd9f3d5350544eb' 
  AND token = 'WU3sHyhPiZ40+lgcWUbEyt7WpuaL/QgaJa1KVvs/ZGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}