Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9de5aaa5201ee177388a768c4766aa29204b9bec24126f077073a746dfa6111' 
  AND token = 'TL/zZ246cZZRFz3H/ne1ZvGkot3J/OaJQpM6A3/C1RE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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