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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be23d82a276423076f28bac13719ce43cd22cf33a34138d762aa68e4e59a0ee0' 
  AND token = 'uB0B0gtg+TOlXJa7xDlHsTAAwkWtF33vGeuQcMbSl3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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