SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5dac782026db8f3176f0c4ae95a1385ae2e842d89db6f48753066e462dc334fd' 
  AND token = 'ZGmTIuDdm+6DCJLnj+xaFQkC+eJbrHU/8fuifFgsHd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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