Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7495de928a03c91c225ab8baa29e1d4161b1302267ad4cdb56cd96e007eb04d' 
  AND token = '1YZMy5knvSViimrRIrDUIMI6kjugLqWygbEpB3KbIb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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