SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1e36b58f909aff67f8dda73f18bac809494b356f5273d08142889f7e8d2d161' 
  AND token = 'qZZzsFVEK+/4Pqx4ZdxMyLIpUvu65QDmbZABp0ot25k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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