Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53e1cb5351ffde3e9205552c0fc15593fc6aed010ffb78661071f93e3fd0d075' 
  AND token = '7PE1YGen5zcSyDM9X9qsIWG/elvJEcebqxBFFhIexos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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