Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d6692d955ec17cb5b25140b20ecd29452a92e28f3a0e8b0de916a3253acddc' 
  AND token = 'T+ZrXgImY+6K3tu2drGNKT5aE0dSYK//HqCDelZdsz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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