Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '600253efff2662eb53e3899bfc12315b43a88149ae5c3fcfda81cc5373ec0ea5' 
  AND token = 'BQxvcGB3SLyTv90TEWqqYypFRtxn/5e4GEY47pML/jQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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