SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34d17d1de08341ba393fad439058ad23b6b8ef6693a613c38b813cd9b0187120' 
  AND token = 'QGvYvTzw5PBtDdNHF0xe2hwC+YEVzoGl9NAiJp7m2dQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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