Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a039a2c0762b4c7154a8fd7b76949de9ac70f7dacdc8fb73679f26bf4f4a775' 
  AND token = '2W49D/AeJKRIXQELy4KvUidAxuTaB0OOJ0znlII6o1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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