SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8a89434f1d91294c1d8d5e98ecbf120af537f881c796c3bf2fd4e4ca610caa6' 
  AND token = '96qCJuW0vEocsngvqGSK+jDwQ/NYIwy4bNq9Lkx8xdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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