Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fe45c95271441785e930ee33fcf3f6c5552df0fc643acc572d19fb329d5e3d5' 
  AND token = 'VT7nHfKGH1eEpIELOD2HkcNwhfByKhQxgHX3XRw8Fw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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