Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '534e477687ed2f6bdfebf3b4c025d9f2f314fccfa8872de8d611cf44b495d554' 
  AND token = 'f7Hi09StlLYjsrLkNnaMa6Z1QX7JFj1Sl+dexwfTdjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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