Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aa97ba1900ee671f03fcb853f1bdfec9643f147bc7e027391e82f9907a5da62' 
  AND token = 'rg9B8RRRRuwkskoxWA+UvmZiOSQxXfknV6QNjgphRLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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