Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b17ea10afba69f5f5a52fada7ed41e266c1ecd1ffea95d7db3c6d88e5f845543' 
  AND token = '469eXta/hsmZV9EOuoBQzQ3pB/PhkGHRDwOS80SaTYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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