Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2de3de43609b8402a4cf75240ed442906c03420803709d52f6e7a4392523e81' 
  AND token = 'Yi5XjtIx9a5Y7Paw8gAFaQRUHJeANnSYfmt7P3fl4v8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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