Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac80e2ec9696e257061ca22a05e844cd8c221d912671da63897ff67839042f6f' 
  AND token = 'xEe24PxZmw/ql/7zktymBBLv8R7Y1RyUPdNr9NU84oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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