Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '349225f276fc74d71a0d84af8027e530ecb59f61e4074b1f7cc41f4f93f9011c' 
  AND token = 'hW2lgOPFBtrVSCS9dKCxhQ/yqAfUeHT0zko/YqA2oBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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