SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2df74cd08dee15895d1281012b45560cfdd7e6692bcbe36a3f75ae6a917f9ca7' 
  AND token = 'quYHoMzTNxFh6b+z+57jXNGcoujgKDi33GVL0YIAwV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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