Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042d38159e1a2b454d4b6243f55f5c81d4464e86416c51acbbf69b41e474ea65' 
  AND token = 'eBJ7nXVLdTtlNeyGCyKAhWiOblCkvHjkTvLERniBeiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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