Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '257f7deab9a0cc83a3eddbc975610ae54c5cd1211402f902397279cb4ca094f9' 
  AND token = 'fRdG792ettoNE5T0CGv44DyptIM3PDV3slUHJATe+mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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