Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89e01a642158a08054a7a1cd3bfed2993f8711a5feb92547b834f5b6bda7d965' 
  AND token = '+magMGtgfzaZZ705XNHWRQ4UWgVbrivRCfXU2rrkyDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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