SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8d009c0b7ba504ce326da5b31cf65cc0d5b58e30f7115f4f1c3cf39e7bcdcfde' 
  AND token = 'FYKwCkN1By0SG2gK/XKsjIYZpD0onsoy6ihwG9xHniM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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