SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '95f1b7c4e673879e64b6c05efa46b5958c471ba7a06248f50536068adc7e6dea' 
  AND token = 'YkYGXw9SSS1AcGIhZR9zrCWXjQ82AgvLg33x7Dg17vY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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