Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '641070954e14bf65f489cb881a3a93bc09858be756320a19709e1ee89bbb2750' 
  AND token = 'e4uKDtOnSYs8Ljkc0HYCpXRNH1X0Yp/BXMUxgh7Heig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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