SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '32caeb56c4f7aa0025083fa5b57cd0773e3ccb77f56d8729920d0905494f91bd' 
  AND token = 'XBvcLcBYXtE5dQhXIQgqb4OkitZ5jrPjJLNxDcwKgqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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