Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '908af57f3dba3475f8882410408a2d52b68bbe70f730525e36ccb6263856dedf' 
  AND token = 'DbiXFZ9t+cy1fU1bcuDcRVCjX3JuoAt2tiQ3jabGXPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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