SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '487e4bb188663908ace81e7a4f02270680862d53d9bc1556be66e117b50ef4a7' 
  AND token = 'exwKTnm8Rlf1w+/Y2JDPACX+FxU3kKZk5YCEGRBjsuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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