Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82e760aee6465a3f8c910acb68328a622132a6917eacd8c4776f7d1d21807f29' 
  AND token = 'L3f9M0qDeEqTl8poGSb9h9Nlnn9DwtpRReIOXBa/7nE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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