Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6f8f52412b055562c99ba32e00be5b31dbe602c60c6ac06f151543812c8d8b5' 
  AND token = 'iaWASqbD6b7LQgTmuYlZpfwyZTv4hJ3DdKPvJz6iHO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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