Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46e14c6691cbdb8f03431bad44a10d1456f9fea44d03b7d68c5246d0e291b43d' 
  AND token = 'yvXBp7Iw2J+6On99amqPEy68JBtjypbg0AY4Db3rhQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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