Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93820f508ba84796b0811d7155351d60bf01610d6567586c57c6022e0651f9b2' 
  AND token = 'lLa5SgMUj+hvgvettyyiVpRGMoVu8UsrBQ/CyxyT9l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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