Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c709dafb5ca1f40b21507a6af145d51ceead717190a3ae961a9f93c7438310d' 
  AND token = '9oXwr0IE+xlxuakXP/xgFjlxaHOtoFnUvszxjk87zD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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