Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '498295cab8cb37d63cbe72468cdf6df598a3875051f429bca308311a16816f25' 
  AND token = 'D2/dTOnQVfgMvErCAj83yt4uYvAGQW3LNR5y6q/ziTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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