Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '390a09b6fd005d94bf31cf973a65ec92c25d4257e6a5c7cf2783a8399af85abc' 
  AND token = 'qfBB5LaQBueXREnavlD9LW0QNvmLkOs11ff2tyP4mUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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