Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '588cb885520a287700b57e0e764aa992a8c53615a4615993f21b5eb2cd2a36bb' 
  AND token = '9CnlSKTq6cDol5syc/7OT4atcrCMwSp7xGjDXETd7/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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