Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e99b178de791719ec190be53b0484a42c40a76d0396edf2d32df15c401259fea' 
  AND token = 'SWMfM9OTAOrECaAOlao2FQ38S4Ijh1u5xFak+K/b23Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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